Channel Lining | Charfield, Gloucestershire, UK

1,500m² of CC8^™ installed to armour an overgrown drainage channel

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Project Overview

In October 2021, Concrete Canvas^® GCCM (CC) was used to line a drainage channel located near Charfield, Gloucestershire. The drainage channel was identified to be in need of improvement via the adverse weather programme within Network Rail.

The original channel was unlined, overgrown and in general poor state and action was required to improve drainage of surface water from nearby arable fields.

Channel Preparation: site evaluation, excavation, re-profiling and deployment of CC8^™

1500m²

of CC8^™ used to line the drainage channel

12 Days

while the team of six also worked on additional projects

100mm

overlaps secured with screws for durability

Solution

An armoured solution was required to prevent vegetation growth and reduce future maintenance costs. A GCCM solution was chosen over conventional concrete methods due to the ease of adaption on site to accommodate changes in profile.

CC8^™ Bulk Rolls were chosen for this scheme as they are able to be cut on site with minimal wastage. The scheme was delivered by the NWR Works Delivery Off Track team in collaboration with Onsite Rail Services Ltd.

Design & Installation

The original ditch was filled in and a new 490 metre long channel was cut using a ditching bucket to create to the correct dimensions prior to the installation of the material. Following the ground preparation, Bulk Rolls of CC8^™ material were suspended from plant onsite via a spreader beam and installed in a transverse layout. The perimeter edges secured in anchor trenches that were later backfilled with compacted soil. Each new layer overlapped the previous layer by 100mm, shingled in the direction of water flow. Overlaps were secured together using screws at 200mm centres. The CC was then hydrated using water from the surrounding area.

Installed and hydrated CC

Purpose built GRP Sump unit

Summary

In total, 1,500m² of CC8^™ was installed in 12 days while the team of six also worked on additional projects. The installation was deemed a complete success, the contractors were happy with the solution that CC8^™ provided for lining the drainage channel.

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